class Dog():
	def __init__(self,name,age):
		self.name=name
		self.age=age
		
	def sit(self):
		print(self.name.title()+" is now sitting.")
		
	def roll_over(self):
		print(self.name.title()+" rolled over!")
my_dog=Dog('willie',6)

print("My dog's name is "+my_dog.name.title()+".")
print("My dos is "+str(my_dog.age)+" years old.")
my_dog.sit()
